Atomizing-nozzle for oil-burners.



H. HILLMANN.

ATOMIZING NOZZLE FOR OIL BURNERS.

APPLICATION FILED APR. 22. 1918.

1,283,768. Patentd Nov. 5, 1918.

FIG, 6. I

/ENTOR hA/Vs H/LLMANN- Arrvsa ICE.

ATOMIZING-NOZZLE ron oIL-BuRNERs.

To aZZ eohom may concern:

Be it known that I, HANS HILLMANN, a

citizen of Germany, residing at Alton, in

the county of Madison and Stateof Illinois,

have invented new and useful Improve-v ments in Atomizing-Nozzles for Oil-Burners, of which thefollowing is a specifica tion..

My object is to make an improved'atomizing oil burner and my invention consists of the novel features herein shown, described and claimed.

Figure 1 is a vertical longitudinal section on the line 11 of Fig. 4. v Fig. 2 is a rear end view of the nozzle unscrewed from the air and oil pipes as seen looking in the direction indicated by the arrow 2 in Fig. 3. i

Fig. 3 is acentral section in the line 33 of Fig. 2.

Fig. 4 is a front elevation looking in the direction indicated by the arrow 4 in Fig. 1.

Fig. 5 is a horizontal sectional detail on the line 5-5 of Fig. 3.

Fig. 6 is a cross section of the line 6'6 of Figs. 1, and 5.

An angle valve casting 1 is'screwed onto the upper end of an oil pipe 2 and a valve stem 3 is mounted horizontally through the.

casting in a line crosswise of the oil pipe 2.

The stem 3 operates through a stuffing box construction 4 and extends through a valve chamber 5 and engages a valve seat 6, there being a discharge opening 7 leading through. the valve seat 6.

A pipe 8 is screwed into the casting in line with the valve seat 6, so that the passage 7 communicates directly with the passage through'the pipe.

A T 10 ,is mounted around the pipe 8 and screwed upon the end of the casting 1 thus producing a chamber 11 within the T 10 around the pipe 8.

An air pipe 12 is tapped into the-side opening of the T 10, said air pipe 12 being parallel with the oil pipe 2.

An atomizing nozzle 13'is connected to the pipe 8 and to the T 10.

The details of the atomizing nozzle 13 are as follows:

A chamber 14 is coredin the casting and an internally screw-threaded bore 15 leadsto the chamber 14; a small counter bore 16 extends from the chamber 14 in axial alinement' with the bore 15; a slot 17 ex tends from the chamber 14 to the front face Specification of Letters Iatent.

Patented Nov. 5, 1918.

Application filed April 22, 1918. SeriaI No. 230,031.

.18 of the casting 1, said slot being hori-' zontally transversely elongated, and said slot being tapered downwardly from its rear or inner' end. A bore 19 is formed from the side face 20 about three quarters of the way to a side face 21, said bore 19 cutting into the slot 17 and a plug 22 is screwed into the outer end of the bore 19,

so that the chamber left in the bore extends equal distances each side of the center of' f the bottom of the bore 16 into the bore 19;

a small bore24 is formed from the face 21 parallel with the axis of the bore 19 and communicating side by side with the bore A plug 27 is inserted into the bore 24, said plug being practically the same length as the depth of the wall from the face 21 to the bore 19. r

The atomizer thus constructed is placed in position by screwing the remaining endof the T 10 into the threads 15 thereby pressing the .end of the pipe 8 into the counter bore 16.

The parts should be adjusted so that an outlet orifice 28 which is the forward end of the sl0t'17 is horizontal.

1n the practical operationthevalve stem 7 3 is operated to allow oil, preferably under a pressure of about twenty pounds, to run through the'pipe 8 through'the counter bore and discharges through the slots 17. A porti on of the air striking the outer horizontal edge of the bore. 19 is diverted into said bore and given a rotary motion, as indicated by the arrow in Fig. 3. The oil issuing from the small bore 24- is caught by the whirling air and atomized. The atomized oil on reaching the current of air passing through the slot 17 is subjected to a second atomization and simultaneous mixing with the air, and leaves the burner nozzle 13 in the form of a thin horizontal sheet of homogeneous fuel mixture. The advantages of my burnerare as fol lows: The burner nozzle is easily attached to and removed from the pipe 10. A olig- I I ging of the nozzle is practically impossi for the reason that wide apertures are used throughout. In actual use the burners have been in operation for weeks without intermission, notwithstanding the fact that heavy crude oil of a poor quality was used. Because of the homogeneous fuel mixture, a more rapid combustion with a generation of high temperature is efl'ected, and furthermore, the thin sheet of flame radiates the heat quickly.

In place of air, steam may be used for atomizing the oil.

Various changes may be made Without departing from the spirit of my invention as claimed. 1

I claim: I

l. The atomizing nozzle for oil burners having a cored chamber, a passage leading to said chamber, a counter bore leading f1 cm the chamber, a slot from the cored chamber to the front face and forming a discharge orifice, a circular chamber above the slot and communicating therewith and a passage leading from the counter-bore to the circular chamber.

2. An atomizing nozzle for oil burners.

comprising a casting having a cored chamher; a screw-threaded passage leading to the chamber; a counter bore leading from the chamber in axial alinement with the screw-threaded passage; a slot leading from the cored chamber to the front face and forming a discharge orifice; a circular chamber above the slot and communicating therewith and a passage leading from the counter bore to the circular chamber.

3. An atomizing nozzle for oil burners comprising a casting having a cored chamher; a screw-threaded passage leading to the chamber; a counter bore leading from the chamber in axial alinement with the screwthreaded passage; a slot leading from the cored chamber to the front face and forming a discharge orifice; a circular chamber above the slot and communicating therewith and a passage leading from the counter bore to the circular chamber, there being a small bore parallel with the circular chamber and communicating therewith, said small bore being crosswise of the. bore leading to the circular chamber, and the outer end of same being plugged.

In testimony whereof I have signed my name to this specification.

HANS HILLMAN. 

